Luxury Spaces, Extraordinary Experiences. Award-winning, independent self-catering company Cornish Gems is a leading holiday home specialist trusted to curate memorable holiday experiences. It offers an exclusive collection of quality self-catering properties, that range from countryside boltholes made for two, to extravagant riverside and sea view properties sleeping up to 20, alongside Eco-Conscious Gems designed to offer a more sustainable holiday, without compromising on luxury.